<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>验证的使用</title>
</head>
<body>
    <form action="test02.php" method="post">
        <table>
            <tr>
                <td><input type="text" name="captcha" id=""></td>
                <td>
                    <image src="controller.php" onclick="this.src='controller.php?' + Math.random()"/>
                </td>
            </tr>
        </table>
        <button class="">提交</button>
    </form>
</body>
</html>